| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 17, Number 1, 2021
|
|
|---|---|---|
| Article Number | 22 | |
| Number of page(s) | 8 | |
| DOI | https://doi.org/10.1186/s41476-021-00165-8 | |
| Published online | 19 October 2021 | |
Research
Realization of a polarization-insensitive optical frequency-domain reflectometer using an I/Q homodyne detection
1
S.C. NanoPRO START MC. S.R.L, Oltenitei, no 388, district 4, Bucharest, Romania
2
University POLITEHNICA Bucharest, Splaiul Independentei no. 313, Bucharest, Romania
3
Department of Electronic Engineering, Universidad Técnica Federico Santa María, 2390123, Valparaíso, Chile
4
Academy of Romanian Scientists, 050094, Bucharest, Romania
Received:
21
January
2021
Accepted:
20
August
2021
We report on the development and implementation of an optical frequency-domain reflectometer (OFDR) sensing platform. OFDR allows to measure changes in strain and temperature using optical fibers with a length of several tens of meters with very high spatial resolution. We discuss the operation principles and challenges to implement an OFDR system using optical homodyne detection based on a dual-polarization 90° optical hybrid. Our setup exhibits polarization and phase diversity, fully automated data acquisition and data processing using a LabVIEW-based implemented software environment. Using an optical hybrid enables to discriminate phase, amplitude and polarization by interfering the Rayleigh scatter signal and a local oscillator with four 90° phase stepped interferences between the two signals. Without averaging and a fast acquisition time of 230 ms, our preliminary results show a spatial resolution of 5 cm and a temperature resolution of about 0.1 Kelvin on a 3 m-long fiber.
Key words: Optical frequency-domain reflectometry / Distributed optical fiber sensing / Temperature sensing
© The Author(s) 2021
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